Rowing machine



FIG. 1 is a perspective view of a rowing machine showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is an end elevational view thereof of the end opposite that shown in FIG. 3;

FIG. 5 is a side elevational view thereof, the side opposite being substantially a mirror image; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for rowing machine, as shown and described. 